One central lesson of the sovereign debt crisis is that the Eurozone (and the EU) needs institutional reform. Many observers argue that the monetary union should be complemented by a fiscal union . In this paper we provide the first quantitative analysis of important economic effects of an EU...

Several frictions restrict the government s ability to tax assets. First of all, it is very costly to monitor trades on international asset markets. Moreover, agents can resort to non-observable low-return assets such as cash, gold or foreign currencies if taxes on observable assets become too...